Hi everyone-

I am working with three dimensional data that measures a certain gas at
different latitudes, longitudes, and heights (in the atmosphere).  I have
successfully visualized the data using the "slab" module, which shows the
gas at one specific height and all lats and lons.  I recently downloaded
the cartographic dx bonuspak, and am now interested in showing the
same data on or over the globe.  (In my existing visualization, I have the
map projected onto the slab, but I am now looking to have it done in an
actual spherical shape that rotates)  When I replace the "slab" module
with "sphere" I get the message: 
"ERROR: Sphere: Compute: Bad parameter: Input 0 used in expression and
supplied as NULL" 
and the same message appears if I try to put the "World Map Projections"
onto a sphere as well.  I am clearly going about this the wrong way.  Any
help in turning my flat visualization into a rotating sphere would be
greatly appreciated!

Thanks,

Marissa Forbes 

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